NL8303660A - Producing food pellets for cattle, poultry etc. - by mixing starting material with molasses, fat etc. whilst admitting steam and pre-compacting mixt. before passing to pelleting press - Google Patents

Abstract

Method is used for producing food pellets for cattle, poultry etc. whereby starting material with additions such as molasses and fat are mixed in a cylinder and heated with steam and the mixt. obtd. at the end of the cylinder passed to a pelleting press. Before entering the pelleting press, the mixt. is pre-compacted. The mechanism used pref. comprises a horizontal mixing cylinder contg. a driven bladed co-axial shaft, the pre-compacting press being arranged at the outlet end of the cylinder and discharging into the press.

Description

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Method and device for manufacturing food tablets for cattle, poultry and the like.

The invention relates to a method and an apparatus for manufacturing nutritional tablets for cattle, poultry and the like, wherein raw materials with additives, such as molasses and fat, are mixed in a mixing cylinder 5 and heated with steam, and at the end of the mixture obtained from the mixing cylinder is fed to a tabletting press to be pressed therein into the nutritional tablets.

Such a method and device is known.

In this known method and apparatus, the tableting press is in the form of a rotatable thick-walled, perforated cylinder jacket into which the mixture is introduced to be forced out through the perforations by rollers arranged within the cylinder jacket, so that the mixture is in the form of rod-shaped tablets on the outside of the cylinder jacket exits from the perforations and is then cut off and discarded by a stationary scraping knife.

Thus, the mixture is pressed into the rod-shaped tablets in the perforations of the cylinder jacket of the tabletting press. The thicker the cylinder casing of the press, the longer the perforations and the stronger the material pressed by the rollers through the perforations. Originally, a cylinder jacket thickness of about 7 centimeters was sufficient to compress the supplied mixture in the press into sufficiently cohesive and compact tablets.

However, more and more for the manufacture of nutritional tablets for cattle, poultry and the like raw materials.

Such as the shells of vegetable, oil or fat-containing seeds or kernels from which the oil or fat-containing constituents have been extensively removed by an intensive pressing operation and / or by extraction.

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In order to be able to press these scrambled raw materials with the additives into compact, cohesive tablets, the pressing pressure must be increased to a large extent ......

According to the known method and device, this is done by increasing the thickness of the cylinder jacket in whose perforation the pressing has to take place into the bar-shaped tablets.

Over time, the thickness of this cylinder jacket has increased from 7 centimeters to approximately 10 centimeters.

When such a thicker cylinder jacket 10 is used in the tabletting press, the drawback is that the temperature of the mixture pressed through the perforations rises very high, which does not improve the quality of the tablets.

Moreover, when such thick cylinder-jackets or dies are used, there is a danger that the perforations will clog by expanding the already compressed mixture at the high temperature in the perforations.

For the opener again! of the clogged perforations, the tableting presses must be decommissioned to cool the cylinder jacket or the cylinder jacket-shaped die. By the way, in general, the unclogging of the blocked. perforations a time-consuming and cumbersome work.

The object of the invention is to overcome this drawback of the known method and device.

The method according to the invention is therefore characterized in that the supply of the mixture from the mixing cylinder to the tabletting press takes place via an intermediate in which the mixture is pre-compacted.

Thus, according to the invention, the mixture leaving the mixing cylinder 30 is not fed directly to the tabletting press, but is first pre-compacted by a pre-compression and then this pre-compacted material has the opportunity to cool and then is fed into the tabletting press to form the final product. be compacted.

Because pre-compacted material is already introduced into the tabletting press, the cylinder casing or die can be relatively thin-walled, such as, for example, in the original 8303660. The usual size of 7 centimeters, as a result of which the mixture passes through the perforations. feeding in the tabletting press will rise less high in the temperature and the aforementioned drawbacks will not occur.

The device for applying the method according to the invention consists of a horizontally extending mixing cylinder, with a coaxial and centrally extending, and mixing blade shaft, and behind which mixing cylinder the tabletting press is connected and is further characterized that between the mixing cylinder and the tabletting press is provided with an intermediate which allows the mixture to be pre-compacted from the mixing cylinder before being introduced into the tabletting press.

In an effective embodiment of the device according to the invention, the intermediate press is formed by a stationary perforated cylinder jacket or mold within which and against which one or more rollers supported by a central drive shaft are rotatable for pressing through the perforations and thereby pre-compacting the mixture introduced within the cylinder jacket 20.

Advantageously, according to a further feature of the device according to the invention, the central drive shaft of the intermediate press forms a whole with the mixing shaft of the mixing cylinder.

In this embodiment of the device according to the invention, the perforated cylinder jacket or die of the intermediate press can be arranged caoxially with the mixing cylinder behind them. In this embodiment, the mixing cylinder and the housing of the intermediate press can advantageously also be fixedly coupled together.

In a further expedient embodiment of the device according to the invention, one or more scraper blades, fixedly coupled to the central drive shaft, are movable over the outer surface of the cylinder jacket of the intermediate presses for cutting off the mixture pre-compacted from the perforations.

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The invention will now be further elucidated with reference to the drawing of an exemplary embodiment.

As shown in the drawing, the device is formed by a horizontally extending mixing cylinder 1 with 5 a mixing shaft 2 with blades 3 running coaxially with the cylinder jacket. The mixing shaft 2 can be driven by the electric motor 4 over the belt transmission 5. The mixing cylinder 1 is provided with a filling funnel 6 into which raw materials such as the skins of pressed and / or extracted palm kernels, 10 copra, linseed, etc. can be introduced into the cylinder, in which it is added with additives such as fat and molasses and under heating with steam, which the arrow A is introduced into the cylinder, to be processed into a homogeneous mixture, and that over the partition wall 7 ih>. the stationary cylinder jacket-shaped molds 9 provided with perforations 8 may fall down.

On the mixing shaft 2 are provided the supporting members 10 which bear the rollers 11 at the ends, which roll around the inner wall of the mold 9 with the rotation of the mixing shaft 2 and the mixture 20 introduced into the mold is pressed through the perforations 8 and pre-compacted into bars. The scraper blades 12 are movable over the outer circumference of the die 9 for cutting off the pre-compacted mixture which has stepped out of the perforations, which is then fed over the outlet 13 into the partly indicated tabletting press 14 in order to form the final product therein. are processed.

The scraper blades are supported on the mixing shaft 2 by means of the elements 15 and can be driven with this mixing shaft.

In addition to manufacturing nutritional tablets for cattle, poultry and the like, the method and the device according to the invention can also be used for compacting other materials into tablets such as, for example, household waste.

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Claims (6)

1. A method of manufacturing feed tablets for cattle, poultry and the like, wherein raw materials with additives, such as molasses and fat, are mixed in a mixing cylinder and heated with steam, and the mixture obtained at the end of the mixing cylinder into a tablet Tar press is supplied, characterized in that the mixture is supplied from the mixing cylinder to the tableting press via an intermediate press in which the mixture is pre-compacted. 2. Device for applying the method according to claim 1, formed by a horizontally extending mixing cylinder, with a coaxial and centrally extending, and mixing blade shaft, and behind which mixing cylinder a tableting press is connected, characterized in that between the mixing cylinder and the tabletting press are provided with an intermediate press, by means of which the mixture from the mixing cylinder can be pre-compacted before being introduced into the tabletting press. 3. Device as claimed in claim 2, characterized in that the intermediate press is formed by a stationary perforated cylinder jacket, within which and against which one or more rollers supported by a central drive shaft are rotatable for pressing through the perforations and thereby pre-compacting the mixture introduced within the cylinder jacket. 4. Device according to claim 3, characterized in that the central drive shaft is integral with the mixing shaft of the mixing cylinder. 5. Device according to claim 4, characterized in that the mixing cylinder and the housing of the intermediate press are fixedly coupled to each other. 8303660 ...... ........ * \ 6. Device according to claim 4 or 5, characterized in that one or more scraper blades, fixedly coupled to the central drive shaft, are movable over the outer surface of the cylinder jacket of the intermediate press for cutting off the perforations emerging from the perforations. swabs pre-compacted mixture. 8303660. I